Coat a 9×13 baking pan with cooking spray. Pour 1/3 of Enchilada sauce on bottom of pan. Wrap one tortilla at a time in a wet paper towel and heat in microwave for 10 sec. (this makes tortilla easy to work with). Spoon chicken mixture onto tortilla, wrap and place in pan. Repeat for remaining tortillas. Evenly spread cheese on top.

Place baking pan in preheated oven and bake for 20 mins. Remove from oven and top with remaining chopped onions, diced tomatoes and sour cream. Enjoy!